| 1. Round | 07/08/1998 | Trabzonspor | - | Gaziantepspor | 0:1 |  |
 |
||
| 3. Round | 22/08/1998 | Beşiktaş | - | Gaziantepspor | 1:1 | ||||
| 4. Round | 29/08/1998 | Gaziantepspor | - | MKE Ankaragücü | 1:0 | ||||
| 5. Round | 12/09/1998 | Antalyaspor | - | Gaziantepspor | 3:1 | |
|||
| 8. Round | 17/10/1998 | Bursaspor | - | Gaziantepspor | 2:1 | ||||
| 11. Round | 07/11/1998 | Gaziantepspor | - | Erzurumspor (1968-2015) | 3:0 | |
Mali
Turkey